Turning and boring machine



Feb. 28, 1933. c. LANDERS TURNING AND BORING MACHINE Original Filed Jan. 2.5, 8

Ill

lid /5 /Z5 CAar/w ism/era Patented Feb. 28, 1933 UNITED STATES PATENT CHARLES LANDERS, or ANSING, MICHIGAN.

TURNING Ann BORING 'MAGHINE Original application filed January 23, 1928, Serial No. 248,842. Divided and this November 20, 1929.

This invention relates to the manufacture of bearings'of the interchangeable type commonly used on automobile engines, and this application has to do particularly with a bearing turning and boring machine such as is disclosed in my prior application, S. N. 248,842, filed January 23, 1928 which has matured into Patent No. 1,7 61,926, issued June 3, 1930, of which this is a division. In such prior application, the bearing back is formed from sheet metal, such as brass or steel, by cutting it to length and forming it up into the shape of a half bearing. This half hearing is then coated with tin and babbitt, and the parting line, that is, the meeting edges of the bearing halves is machined, as by broach- The next step consists in boring the halves,

trimming them off to length and bevelling the ends. These operations may-all be performed on one machine, which machine is the subject matter of the present application. It will be understood however, that this machine may obviously be employed for turning and boring bearings which have been previously formed by other steps than those disclosed in my prior application, or other articles of cylindrical form.

According to the present invention, these operations are performed by placing a pair of bearings together and mounting the cylinder thus formed in a holder within which rotates an arbor carrying a cutter for the inside boring as well as spaced cutters for trimming the cylinder to length and bevelling its ends. The cutting to length is governed by stops of any usual character on the machine, thus insuring accuracy.

Subsequent operations necessary to finish- 40 ing the bearing are not set forth herein as they form no part of the present invention.

In the drawing: Figure 1 is a side elevation, partly in sec- 5 tion, and Figure thereof.

In the apparatus illustrated, 104 indicates the base of themachine which carries spaced bearings 106 for a rotating shaft 108 carrying the cutter 110 for inside turning and 2 is a transverse sectional view application ;fl1ed Serial No." 408,495.

spaced cutterslll bearing blades 112 for trimming to. length an'd-blades'113for cham fering. j :f' H 1 Upon the base 104 arearranged guides 116; Within which slides member118 carrying the bearing 120 having a hinged portion 122 Whichmay be locked to the lower half by the clamping member124. The slide'118 car I ries rack'126 engagedgby pinion 128 carriedbgga shaft-130 which may be rotated by handle In the operation of this'device the clamping member 122 is swung to. open position and av pair of bearing halves are inserted'inposition surrounding the shaft 108. -The- Y member 122 is then swung. down and locked in place. Shaft 108is'then rotated and withthe parts in the position shown in Figurel the interior of the bearingsis bored. During this operation the slide 118 is advanced along the shaft either manually or automatically so that the entire inner surface is machined.

At this time the handle 132 is manipulated to move the slide 118and the bearings carried thereby into engagement with first one and then the other of the cutters 112 and 113 for trimming to length and chamferingthe ends. The machine is preferably provided" with fixed stops tolimit the extent of the lastnamed cuts. i The slide 118v may then be so moved to its other extreme position where the other end isrtrimmed. r

While this operation has been described as though the interior boring werethe first operation to be performed, it will obviously be found most convenient to start withthe slide 118 at one of its extreme positions, trim one end, move the slide through its intermediate position for the interiorboring and to its other extreme position for the chamfering. The bearings are at this time removed from the holder and new bearings substituted and the operation repeated in reverse sequence.

It will be seen from the foregoing that I have designed a machine for performing this series of operationswhich is simple both in structure and operation, insuring accuracy with a minimum amount of time and labor,

' and which is capable of use not, only in turnhalves, but also in performing these various operations on other cylindrical or semi-cylindrical articles.

In drafting theclaims herein, the patents to Smith, 466,728 and Austin 1,094,187, cited in applicants prior case, have. been con sidered. H v

I claim:

1. The combination of a rotatable shaft, i 19 cutting elements longitudinally spaced on said shaftcomprising immovably spaced end facing tools and an interior'boring tool'arrangedbetween said end facing tools, disconnectible clamping means surrounding said shaft and arranged to clamp a plurality of bearing segments in the form of a cylinder about the shaft between'the end facing tools, means for rotating said shaft, and means for producing relative longitudinal movement of said shaft and clamping means, whereby the bearing segments'are caused to engage the end facing tools to face the ends of the'seg- @ments, and to pass-over the interior boring tool to bore" the interior of said segments.

2.' A combinedinterior boring and end fac-' ing machine having rotatable cutting elements constituting "end facing and boring means immovably fixedin spaced relation to each other, work holding means for clamp- 3 f ing bearing segments about the axis of rotation of said-cutting elements and between said end facing means, and movable along:

said. axisnof' rotation'to'engage the ends of the work held thereby successively with the end facing means, and to engage the interior thereof with the boring means.

3. In a machine of the class described, a

rotatable shaft, immovably spaced'end facing tools fixed on said'shaft, an interior boring tool'on said shaft-intermediate said end facing tools and in spaced relation thereto, work clamping'means for holding bearing segments about said shaft between said end facing tools, and means for relatively mov-s- -ing said clamping means and rotatable shaft during rotation of the latter, to successively engage the work with'said' end facing tools and said boring tool. s

In testimony whereof I aflix my signature.

CHAS. LANDERS, 

